I had a tubal ligation a little over 2 years ago. But, for the last week I have been experiencing back cramp, lower abdominal cramps, fatigue, and cravings. I am 5 days late on my cycle (which i am never late). I have taken 2 tests and both were negative. I am waiting to hear back from my doctors office, but just wondering if anything like this has happened to anyone. If so, were you pregnant? The only time I have ever experienced these type of back cramps, I was pregnant....